STATEN ISLAND, N.Y. -- A command post that had been set up at the Silver Lake home of missing 12-year-old Katarina Rikic has been moved to the parking lot of Blessed Sacrament R.C. Church to accommodate the many volunteer groups that have joined the search.

An NYPD spokesman said the case is not being treated as an abduction, but as a missing persons case.

Although she was not known to have done this before, Katarina left home after an argument with her mother, her father, Milan Rikic said.

A tall white girl with reddish-blond hair and hazel eyes, Katarina was wearing a blue top with blue shorts and flip-flops. She wears braces, is 5-feet-8 and weighs 130 pounds. She has a mole on the left side of her face and a birthmark on her elbow. NYPD radio transmissions Saturday morning said she was carrying a Nike-branded duffel bag.

Katarina left home around 5:30 p.m., Friday, and was seen at Elwood Place and Delafield Avenue in Randall Manor about an hour later.

Katarina's grandmother, Gail Hartshorne, said that the family has called all of her friends, but no one has heard from her.

“We just want her to come home,” she told WCBS news. “So if somebody has her, if they would just please let her come
home…”

The police search last night with helicopters continued Saturday with canine units and dozens of officers canvassing the area.

The search has been further bolstered by over 150 volunteers, many of them from Snug Harbor Little League, Blessed Sacrament, where she is a student, and Hillside Swim Club where her family is a member and she competed in the Interclub Swim Championships two days ago.

Family and friends have posted flyers with her image on Forest Avenue's light poles, at Key Food and almost every storefront door in surrounding neighborhoods.

The search area included West Brighton, New Brighton, Westerleigh and Randall Manor, and Clove Lakes and Silver Lake parks.

Rikic said neighborhood residents have been helpful in turning over video surveillance video tape to help track Katarina's movements.

News of the disappearance, which was first reported on SILive.com Friday at 11 p.m., spread quickly. Text messages have been ricocheting around Staten Island cellphones, seeking any information about Katarina. More than 3,000 people have shared SILive.com stories about her disappearance on Facebook, and hundreds have taken to Twitter to share the stories.

A police source said she was wearing flip-flops, a blue shirt and blue shorts. Police radio transmissions Friday night said Katarina had been wearing white sweat pants.